In addition to the factors of high continuity and complexity, port operation exists much higher fatalness and insecurity than ordinary trade.

• 港口生产是多工种、多环节的联合作业，具有作业点多、线长、分散、受自然因素影响大的特点，加之港口生产的高度连续性及复杂性，致使港口生产中潜在着比一般行业更大的危险性和不安全因素。